commander killed wednesday in an air strike. you see that. leaders in neighboring egypt warn the violence could soon escalate out of control. >>> and hurricane sandy exposed just how vulnerable millions of americans are to power outages. but that could just be the iceberg's tip. a new federal study warns a terrorist attack on the u.s. power grid could plunge parts of the country into darkness for weeks or even months because key pieces of equipment are unguarded and lack the technology needed to stop outages from spreading. >>> new questions about safety of the popular energy drinks. the fda investigating reports that the supercaffeinated 5-hour energy drink could be linked to as many as 13 deaths. the drinksmaker denies any proven connection to its products and those cases. >>> a group is urging the government to crack down on new version of cracker jacks about to hit stores. it has new flavors with extra pop, with caffeine. why we are caffeinating cracker jacks is beyond me. but the makers insist the snack won't be marketed to children. >>> here's diane sawyer with a preview of tonight'